5. Process Improvement
5.6. Case Studies

5.6.2.

Sonoluminescent Light Intensity Case Study

Analysis of a 2^7-3 Fractional Factorial Design

This case study demonstrates the analysis of a 2^7-3 fractional factorial design. The purpose of the study is to optimize sonoluminescent light intensity.

The case study is based on the EDA approach to experimental design discussed in an earlier section.

Contents

The case study is divided into the following sections:

1. Background and data
2. Initial plots/main effects
3. Interaction effects
4. Main and interaction effects: block plots
5. Important Factors: Youden plot
6. Important Factors: |effects| plot
7. Important Factors: half-normal probability plot
8. Cumulative Residual SD plot
9. Next step: DOE contour plot
10. Summary of conclusions
11. Work this example yourself